Piston pump

Abstract

The utility model discloses a piston pump which comprises a pump shell, a driving device and a pump cavity are arranged in the pump shell, the upper end of the driving device extends into the pump cavity to be matched with the pump cavity, a water inlet and a water outlet which are communicated with the pump cavity are formed in the pump shell, a water inlet connector is arranged on the water inlet, and a water outlet connector is arranged on the water outlet. A water inlet valve block is arranged between the water inlet and the water inlet connector in an abutting mode, a water outlet valve block is arranged between the water outlet and the water outlet connector in an abutting mode, a plurality of radial notches which are evenly distributed are formed in the inner wall of the water inlet, a supporting part is formed between every two adjacent radial notches, and the water inlet valve block is matched with the supporting parts. The supporting part can make contact with and support the water inlet valve block, the water inlet valve block is prevented from being damaged due to excessive deformation, under the condition that the caliber of the water outlet is kept unchanged, the caliber of the water inlet is increased through the arrangement of the radial notch, more flow of water can be pumped in, and therefore the output water pressure is increased to meet application scenes with higher requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of teeth washer, in particular to a piston pump. Background Art

[0002] A water flosser is an efficient oral cleaning tool that uses high-pressure water jets to clean teeth. The working principle of a water flosser is to pressurize water and then spray high-speed water through a small nozzle to impact food residues and dental plaque on the tooth surface and between teeth, thereby cleaning teeth, between teeth and gums.

[0003] In a tooth washer, the piston pump is a key component that is mainly responsible for the delivery of liquid. The working principle of the piston pump is mainly to use the reciprocating motion of the piston to achieve liquid delivery. When the motor is started, it will drive the piston to reciprocate in the pump body, which will cause the pressure of the liquid in the pump body to change, thereby achieving liquid delivery. Specifically, when the piston moves downward, the space in the pump body will increase, causing the internal pressure to decrease. At this time, the liquid will be sucked into the pump body from the water inlet; when the piston moves upward, the space in the pump body will decrease, and the internal pressure will increase, thereby pushing the liquid out of the pump body and flowing out through the water outlet. Through the continuous reciprocating motion of the piston, the tooth washer can continuously deliver liquid. However, the existing piston pumps have some problems. For example, the diameter of the piston pump water inlet is small, resulting in a small water inlet flow rate and a small output water pressure, which may not meet the cleaning needs of some users. However, if the diameter of the piston pump water inlet is directly enlarged, the water inlet valve plate in the water inlet will lack support, thereby affecting its normal operation. In addition, the increase in water inlet flow rate will cause the water inlet valve plate to produce greater deformation. If the deformation of the water inlet valve plate is too large, it may cause damage to the water inlet valve plate, thereby affecting its service life. Therefore, it is necessary to improve it. Utility Model Content

[0004] The utility model aims to provide a piston pump with a simple and reasonable structure and convenient operation in view of the defects and shortcomings of the prior art. The inner wall of the water inlet is provided with a plurality of evenly distributed radial notches to increase the water inlet area. When the diameter of the water outlet remains unchanged, the increased diameter of the water inlet can pump in more water flow, thereby increasing the output water pressure. The support portion can contact and support the water inlet valve plate to prevent the water inlet valve plate from excessive deformation and damage.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A piston pump described in the utility model comprises a pump casing, wherein a driving device and a pump chamber are arranged in the pump casing, the upper end of the driving device extends into the pump chamber and cooperates with the pump chamber, a water inlet and a water outlet connected with the pump chamber are provided on the pump casing, the water inlet is provided with a water inlet joint, the water outlet is provided with a water outlet joint, a water inlet valve plate is abutted between the water inlet and the water inlet joint, a water outlet valve plate is abutted between the water outlet and the water outlet joint, a plurality of evenly distributed radial notches are provided on the inner wall of the water inlet, a support portion is formed between two adjacent radial notches, the water inlet valve plate cooperates with the support portion, and when the water inlet valve plate is deformed toward the support portion, the support portion can contact and support the water inlet valve plate.

[0007] Furthermore, the radial notch is arranged in a tooth shape.

[0008] Furthermore, a water inlet channel is provided in the water inlet joint, and the water inlet channel is arranged in an "L" shape.

[0009] Furthermore, a first arc-shaped cutout is provided on the water inlet valve plate, and the first arc-shaped cutout forms a first elastic sheet portion in the middle of the water inlet valve plate that can be ejected under force.

[0010] Furthermore, a second arc-shaped cutout is provided on the water outlet valve plate, and the second arc-shaped cutout forms a second elastic sheet portion in the middle of the water outlet valve plate that can be ejected under force.

[0011] Furthermore, a spring is provided in the water outlet joint, one end of the spring abuts against the inner wall of the water outlet joint, and the other end of the spring abuts against the water outlet valve plate, and the spring has a movement tendency to make the water outlet valve plate close to the water outlet.

[0012] Furthermore, the driving device includes a driving motor, an eccentric seat, a gear plate, a connecting rod and a piston. The driving motor is fixed in the pump housing, the output end of the driving motor is meshed with the gear plate, the upper end surface of the gear plate is provided with an eccentric seat, the piston is movably arranged in the pump chamber, one end of the connecting rod extends into the pump chamber and is transmission-connected to the piston, the other end of the connecting rod is transmission-connected to the eccentric seat and reciprocates up and down with the rotation of the eccentric seat, thereby driving the piston to reciprocate in the pump chamber.

[0013] Furthermore, a sleeve matching with the piston is provided in the pump housing, a Y-shaped ring is provided on the outer wall of the piston, the outer wall of the Y-shaped ring is sealed with the inner wall of the sleeve, the pump chamber is formed between the sleeve and the piston, and a water inlet and a water outlet connected with the pump chamber are provided on the sleeve.

[0014] Furthermore, the opening direction of the Y-shaped ring faces the water outlet joint.

[0015] Furthermore, the pump housing is provided with a limiting step that matches the water outlet joint.

[0016] The beneficial effects of the utility model are as follows: a piston pump described in the utility model has a plurality of evenly distributed radial notches on the inner wall of the water inlet, a support portion is formed between two adjacent radial notches, the water inlet valve plate cooperates with the support portion, and when the water inlet valve plate is deformed toward the support portion, the support portion can contact and support the water inlet valve plate to prevent the water inlet valve plate from being excessively deformed and damaged, thereby affecting the service life of the water inlet valve plate; the radial notches are arranged in a tooth shape, which can effectively increase the actual water inlet area of ​​the water inlet and increase the water inlet flow rate; when the diameter of the water outlet remains unchanged, the increase in the diameter of the water inlet enables the piston pump to pump in more water flow during operation, thereby increasing the output water pressure to meet higher demanding application scenarios.

[0017] When the driving motor is working, it drives the gear plate to rotate and then drives the eccentric seat to rotate synchronously. The connecting rod reciprocates up and down with the rotation of the eccentric seat, and then drives the piston to reciprocate in the pump chamber. When the piston moves downward, the space in the pump chamber increases, and the pressure in the pump chamber decreases. The water inlet valve plate is deformed toward the support part under the action of external water pressure, and then opens the water inlet, and water flows into the pump chamber. At this time, the water outlet valve plate is pressed against the water outlet under the action of external pressure and the elastic force of the spring, closing the water outlet; when the piston moves upward, the space in the pump chamber decreases, and the pressure in the pump chamber increases. When the pressure in the pump chamber exceeds the pressure at the water inlet, the water inlet valve plate is deformed toward the water inlet joint under the action of the pressure difference and closes the water inlet. At this time, the water outlet valve plate overcomes the external pressure and the elastic force of the spring under the action of the pump chamber pressure to open the water outlet, and water sprays out from the water outlet joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model at a first viewing angle;

[0019] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 3 It is a structural schematic diagram of the utility model;

[0021] Figure 4 It is a partial exploded schematic diagram of the utility model;

[0022] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0023] Figure 6 It is a schematic diagram of the exploded structure of the utility model;

[0024] Figure 7 is a schematic diagram of the cross-sectional structure of the utility model at a second viewing angle;

[0025] Figure 8It is a structural diagram of the water inlet valve plate.

[0026] Figure 1-8 In: 1. Pump casing; 11. Pump chamber; 12. Water inlet; 121. Water inlet joint; 122. Radial notch; 123. Support portion; 124. Water inlet channel; 13. Water outlet; 131. Water outlet joint; 132. Spring; 14. Sleeve; 15. Limiting step; 2. Driving device; 21. Driving motor; 22. Eccentric seat; 23. Gear plate; 24. Connecting rod; 25. Piston; 251. Y-ring; 3. Water inlet valve plate; 31. First arc-shaped incision; 32. First spring piece portion; 4. Water outlet valve plate; 5. First sealing ring; 6. Second sealing ring. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings.

[0028] like Figure 1-8 The piston pump shown in the figure comprises a pump housing 1, wherein a driving device 2 and a pump chamber 11 are arranged in the pump housing 1, wherein the upper end of the driving device 2 extends into the pump chamber 11 and cooperates with the pump chamber 11, wherein a water inlet 12 and a water outlet 13 connected to the pump chamber 11 are arranged on the pump housing 1, wherein a water inlet joint 121 is arranged on the water inlet 12, and a water outlet joint 131 is arranged on the water outlet 13, wherein a water inlet valve plate 3 is arranged between the water inlet 12 and the water inlet joint 121, and a water outlet valve plate 4 is arranged between the water outlet 13 and the water outlet joint 131, see Figure 5 The inner wall of the water inlet 12 is provided with a plurality of evenly distributed radial notches 122, and a support portion 123 is formed between two adjacent radial notches 122. The water inlet valve plate 3 cooperates with the support portion 123. When the water inlet valve plate 3 is deformed toward the support portion 123, the support portion 123 can contact and support the water inlet valve plate 3 to prevent the water inlet valve plate 3 from being excessively deformed and damaged, thereby affecting the service life of the water inlet valve plate 3. Preferably, in this embodiment, the radial notches 122 are arranged in a tooth shape, which can effectively increase the actual water inlet area of ​​the water inlet 12 and increase the water inlet flow rate. When the diameter of the water outlet 13 remains unchanged, the increase in the diameter of the water inlet 12 enables the piston pump to pump in more water flow during operation, thereby increasing the output water pressure to meet higher requirements of application scenarios.

[0029] Preferably, in this embodiment, a water inlet channel 124 is provided in the water inlet connector 121 . The water inlet channel 124 is arranged in an “L” shape to optimize the direction of water flow. The water inlet connector 121 is connected to an external water pipe for supplying water to the pump chamber 11 .

[0030] Preferably, in this embodiment, refer to Figure 8The water inlet valve plate 3 is provided with a first arc-shaped incision 31, which is easy to process. The first arc-shaped incision 31 forms a first elastic sheet part 32 in the middle of the water inlet valve plate 3 that can be bounced open by force. When impacted by water flow or other external forces, it can effectively deform to open or close the water inlet 12.

[0031] Preferably, in this embodiment, a second arc-shaped incision is provided on the water outlet valve plate 4, which is easy to process. The second arc-shaped incision forms a second spring plate portion in the middle of the water outlet valve plate 4 that can be bounced open by force. When impacted by water flow or other external forces, it can effectively deform to open or close the water outlet 13.

[0032] Preferably, in this embodiment, a spring 132 is provided in the water outlet joint 131, one end of the spring 132 is against the inner wall of the water outlet joint 131, and the other end of the spring 132 is against the water outlet valve plate 4. The spring 132 has a movement tendency to make the water outlet valve plate 4 close to the water outlet 13, thereby ensuring the sealing performance of the water outlet 13 and preventing water leakage.

[0033] Preferably, in this embodiment, refer to Figure 1 , 6 The driving device 2 includes a driving motor 21, an eccentric seat 22, a gear plate 23, a connecting rod 24 and a piston 25. The driving motor 21 is fixedly arranged in the pump housing 1. The output end of the driving motor 21 is meshed with the gear plate 23 to realize power transmission. The upper end surface of the gear plate 23 is provided with an eccentric seat 22. The piston 25 is movably arranged in the pump chamber 11. One end of the connecting rod 24 extends into the pump chamber 11 and is transmission-connected with the piston 25. The other end of the connecting rod 24 is transmission-connected with the eccentric seat 22. Specifically, one end of the connecting rod 24 that is transmission-connected with the eccentric seat 22 is provided with an elliptical hole that matches the eccentric seat 22. The connecting rod 24 reciprocates up and down with the rotation of the eccentric seat 22, thereby driving the piston 25 to reciprocate in the pump chamber 11, which is convenient for the suction and discharge of water.

[0034] Preferably, in this embodiment, a sleeve 14 cooperating with the piston 25 is provided in the pump housing 1 to ensure that the piston 25 can smoothly reciprocate in the pump housing 1, thereby achieving the purpose of pumping water. The outer wall of the piston 25 is sleeved with a Y-shaped ring 251, and the outer wall of the Y-shaped ring 251 is sealed with the inner wall of the sleeve 14, which further improves the sealing performance and prevents water leakage. The pump chamber 11 is formed between the sleeve 14 and the piston 25, and the sleeve 14 is provided with a water inlet 12 and a water outlet 13 connected to the pump chamber 11.

[0035] Preferably, in this embodiment, the opening direction of the Y-shaped ring 251 faces the water outlet joint 131 , which can effectively intercept the water flow and prevent it from flowing into the drive motor 21 , thereby ensuring the normal operation of the drive motor 21 .

[0036] Preferably, in this embodiment, a first sealing ring 5 is disposed between the water inlet joint 121 and the sleeve 14 to improve the sealing performance between the water inlet joint 121 and the sleeve 14 to prevent water leakage, and a second sealing ring 6 is disposed between the water outlet joint 131 and the sleeve 14 to improve the sealing performance between the water outlet joint 131 and the sleeve 14 to prevent water leakage.

[0037] Preferably, in this embodiment, the pump housing 1 is provided with a limiting step 15 that matches the water outlet joint 131, so that the connection between the pump housing 1 and the water outlet joint 131 is more stable, thereby preventing leakage caused by loose connection during use.

[0038] When the driving motor 21 is working, it drives the gear plate 23 to rotate and then drives the eccentric seat 22 to rotate synchronously. The connecting rod 24 reciprocates up and down with the rotation of the eccentric seat 22, thereby driving the piston 25 to reciprocate in the pump chamber 11. When the piston 25 moves downward, the space in the pump chamber 11 increases, and the pressure in the pump chamber 11 decreases. The water inlet valve plate 3 is deformed toward the support portion 123 under the action of the external water pressure, thereby opening the water inlet 12, and water flows into the pump chamber 11. At this time, the water outlet valve plate 4 is deformed under the external pressure and The spring 132 is pressed against the water outlet 13 under the elastic force of the spring 132, closing the water outlet 13; when the piston 25 moves upward, the space in the pump chamber 11 decreases, and the pressure in the pump chamber 11 increases. When the pressure in the pump chamber 11 exceeds the pressure at the water inlet 12, the water inlet valve plate 3 is deformed toward the water inlet joint 121 under the action of the pressure difference and closes the water inlet 12. At this time, the water outlet valve plate 4 overcomes the external pressure and the elastic force of the spring 132 under the action of the pressure in the pump chamber 11 and opens the water outlet 13, and water is sprayed out from the water outlet joint 131.

[0039] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A piston pump, comprising a pump housing (1), wherein a driving device (2) and a pump chamber (11) are arranged in the pump housing (1), wherein the upper end of the driving device (2) extends into the pump chamber (11) and cooperates with the pump chamber (11), wherein the pump housing (1) is provided with a water inlet (12) and a water outlet (13) which are connected to the pump chamber (11), wherein the water inlet (12) is provided with a water inlet joint (121), wherein the water outlet (13) is provided with a water outlet joint (131), wherein a water inlet valve plate (3) is provided between the water inlet (12) and the water inlet joint (121), wherein a water outlet valve plate (4) is provided between the water outlet (13) and the water outlet joint (131), wherein the pump housing (1) is provided with a water inlet joint (121), wherein the water inlet valve plate (3) is provided between the water inlet (12) and the water inlet joint (121), wherein a water outlet valve plate (4) is provided between the water outlet (13) and the water outlet joint (131), wherein the pump housing (1) is provided with a water inlet joint (121), wherein the water inlet valve plate (3) is provided between the water inlet (12) and the water inlet joint (121), wherein the ... The inner wall of the water inlet (12) is provided with a plurality of evenly distributed radial notches (122), a support portion (123) is formed between two adjacent radial notches (122), the water inlet valve plate (3) cooperates with the support portion (123), and when the water inlet valve plate (3) is deformed in the direction of the support portion (123), the support portion (123) can contact and support the water inlet valve plate (3).

2. A piston pump according to claim 1, characterized in that: The radial notch (122) is arranged in a tooth shape.

3. A piston pump according to claim 1, characterized in that: A water inlet channel (124) is provided in the water inlet joint (121), and the water inlet channel (124) is arranged in an "L" shape.

4. A piston pump according to claim 1, characterized in that: The water inlet valve plate (3) is provided with a first arc-shaped cutout (31), and the first arc-shaped cutout (31) forms a first elastic plate portion (32) in the middle of the water inlet valve plate (3) that can be ejected under force.

5. A piston pump according to claim 1, characterized in that: The water outlet valve plate (4) is provided with a second arc-shaped cutout, and the second arc-shaped cutout forms a second elastic sheet portion in the middle of the water outlet valve plate (4) that can be ejected under force.

6. A piston pump according to claim 1, characterized in that: A spring (132) is provided in the water outlet joint (131), one end of the spring (132) abuts against the inner wall of the water outlet joint (131), and the other end of the spring (132) abuts against the water outlet valve plate (4), and the spring (132) has a movement tendency to make the water outlet valve plate (4) close to the water outlet (13).

7. A piston pump according to claim 1, characterized in that: The driving device (2) comprises a driving motor (21), an eccentric seat (22), a gear plate (23), a connecting rod (24) and a piston (25). The driving motor (21) is fixedly arranged in the pump housing (1). The output end of the driving motor (21) meshes with the gear plate (23). The upper end surface of the gear plate (23) is provided with an eccentric seat (22). The piston (25) is movably arranged in the pump chamber (11). One end of the connecting rod (24) extends into the pump chamber (11) and is transmission-connected with the piston (25). The other end of the connecting rod (24) is transmission-connected with the eccentric seat (22) and performs up and down reciprocating motion with the rotation of the eccentric seat (22), thereby driving the piston (25) to reciprocate in the pump chamber (11).

8. A piston pump according to claim 7, characterized in that: The pump housing (1) is provided with a sleeve (14) matched with the piston (25); the outer wall of the piston (25) is sleeved with a Y-shaped ring (251); the outer wall of the Y-shaped ring (251) is sealingly matched with the inner wall of the sleeve (14); the pump chamber (11) is formed between the sleeve (14) and the piston (25); and the sleeve (14) is provided with a water inlet (12) and a water outlet (13) which are connected with the pump chamber (11).

9. A piston pump according to claim 8, characterized in that: The opening direction of the Y-shaped ring (251) faces the water outlet joint (131).

10. A piston pump according to claim 1, characterized in that: The pump housing (1) is provided with a limiting step (15) that matches the water outlet joint (131).

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